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Telstar 18



Telstar18 (Apstar 5) is a Russian communications spacecraft that was launched by a Zenit 3SL rocket from the Odyssey platform floating on the equatorial Pacific Ocean at 04:00 UT on 29 June 2004. It was intended to be a geostationary satellite, but due to the premature stoppage of the boost from the final DM-SL stage, it ended far below the geostationary orbit. Efforts maybe underway to use the trim-maneuver thruster attached to the satellite itself to slowly raise the orbit to an approximately geostationary status. (Fuel use from that thruster usually impacts adversely on the useful lifespan of a geostationary.)

Alternate Names

  • 28364
  • Apstar 5
  • Telstar18

Facts in Brief

Launch Date: 2004-06-29
Launch Vehicle: Zenit 3SL
Launch Site: Odyssey (Sea Launch Platform),

Funding Agency

  • Unknown (Russia)


  • Communications

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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